Lightning occurs when there is a flow of electric charge...

Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. The maximum rate of charge flow in a lightning bolt is about $20,000 \mathrm{C} / \mathrm{s} ;$ this lasts for 100$\mu \mathrm{s}$ or less. How much charge flows between the ground and the cloud in this time? How many electrons flow during this time?

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Key Concepts

Elementary Charge

The elementary charge is the smallest unit of electric charge carried by a single electron, approximately 1.602×10?¹? coulombs. Dividing a total charge by the elementary charge allows us to quantify the number of electrons involved in the charge transfer.

Unit Conversion

Converting time units, such as microseconds to seconds, is crucial when applying formulas like Q = I × t. It ensures that all values are in consistent units, which is necessary for accurate calculations.

Electric Current

Electric current is the rate at which electric charge flows past a point and is measured in amperes (C/s). It is a fundamental concept in electricity, describing how much charge moves over time.

Charge Calculation (Q = I × t)

The total charge transferred is calculated by multiplying the current by the time during which the current flows. This relationship, Q = I × t, is essential for determining how much charge is moved in any electrical process.

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